Episodes cast for
"Ben 10: Alien Force" (2008) More at IMDbPro »

Season: 1 | 2
Year: 2008 | 2009

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Season 1

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Season 1, Episode 1: Ben 10 Returns

18 April 2008
For 5 years, Ben Tennyson has lived a normal life without the Omnitrix. He goes to visit his Grandfather, only to find he's gone, and he's left a message for Ben. A plumber shows up, who tells Ben there's renewed alien activity on Earth, and he was working with Ben's grandfather to solve the case. Ben and Gwen team up to find their Grandfather, and get help from an unlikely source.

	Yuri Lowenthal	...	Ben Tennyson / Forever Knight #3 / JT (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Paul Eiding	...	Max Tennyson / DNAlien (voice)
	Jeff Bennett	...	Magister / Forever Knight #1 (voice) (as Jeff Glen Bennett)
	Dee Bradley Baker	...	Swampfire / Echo Echo / Humongousaur / DNAlien (voice)
	Richard McGonagle	...	HighBreed / Forever Knight #5 / Sensei (voice)
	Kevin Michael Richardson	...	HighBreed Commander / Forever Knight #2 / Guard (voice) (as Kevin M. Richards)
	Vyvan Pham	...	Julie Yamamoto / Mother (voice)

Season 1, Episode 2: Ben 10 Returns, Part 2

18 April 2008
As Ben adjusts to the new Omnitrix, the team searches for clues to the alien plot on Earth hoping to find Grandpa Max.

	Yuri Lowenthal	...	Ben Tennyson / Forever Knight #3 (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin / Forever Knight #4 (voice)
	Jeff Bennett	...	Magister / Forever Knight #1 (voice) (as Jeff Glenn Bennett)
	Dee Bradley Baker	...	Swampfire / Echo Echo / Humongosuar / DN Alien (voice)
	Richard McGonagle	...	Highbreed / Forever Knight #5 / Sensei (voice)
	Kevin Michael Richardson	...	Highbreed Commander / Forever Knight #2 / Guard (voice)

Season 1, Episode 3: Everybody Talks About the Weather

26 April 2008
The team gets a signal from the Plumber's badge. Suspecting it's from Grandpa Max, they investigate. They find a boy who can change into Heatblast. He's being pursued by the local Police who blame him for a string of fires and crop circles. As the team investigates the crop circles they learn more about the alien conspiracy.

	Dee Bradley Baker	...	Swampfire / Jetray / Officer Wells (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	Richard McGonagle	...	DNAlien / Officer (voice)
	Kevin Michael Richardson	...	Sheriff Mason (voice)
	Zeno Robinson	...	Alan Albright (voice)

Season 1, Episode 4: Kevin's Big Score

3 May 2008
While making repairs to the Rustbucket, Kevin steals it. He plans to use it as collateral for some other technology, but it gets stolen from him. Ben and Gwen go after Kevin.

	Dee Bradley Baker	...	Echo Echo / Big Chill / Pickaxe Alien (voice)
	Greg Cipes	...	Kevin Levin (voice)
	John Di Maggio	...	Vulkanus (voice)
	Paul Eiding	...	Grandpa Max (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	Alexander Polinsky	...	Argit (voice)

Season 1, Episode 5: All That Glitters

10 May 2008
Ben and his friends comes across Mike Morningstar after rescuing a girl from nearly being run over by a truck. He's revealed to be a Plumber and both he and Gwen immediately trust him right away. Unfortunately, Kevin is the only one who sees through his charade and calls him out. When Gwen is drained of her magical energy and reduced to being Mike's slave as a zombie. It isn't long until Ben realizes that Kevin was right to have mistrusted Mike from the start.

	Dee Bradley Baker	...	Chromastone / Humongousaur / Jetray (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Paul Eiding	...	Grandpa Max / Truck Driver (voice)
	Kim Mai Guest	...	Lucy / Zombie Girls (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	Kamali Minter	...	Trina / Zombie Girls (voice)
	Wil Wheaton	...	Mike Morningstar (voice)

Season 1, Episode 6: Max Out

17 May 2008
Ken, Gwen's brother, stops in a small town for engine repairs. Grandpa Max arrives first to help. Ben and the others soon arrive. They'll learn more about the alien conspiracy and heavy price will be paid to stop it.

	Dee Bradley Baker	...	Jetray / Humongousaur / Big Chill (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Diane Delano	...	Edna / DNAlien #1 (voice)
	Paul Eiding	...	Grandpa Max (voice)
	Will Friedle	...	Ken / Shem (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	Richard McGonagle	...	DNAlien Interrogator / HighBreed / DNAlien #2 (voice)

Season 1, Episode 7: Pier Pressure

31 May 2008
Ben goes out on a date. All does not go as well as he'd like when objects start attacking him, and he's forced to go hero to protect himself and try to keep his secret from his date.

	Dee Bradley Baker	...	Humongousaur / Jetray / Brainstorm (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Ashley Johnson	...	Gwen Tennyson / Tennis Player (voice)
	Yuri Lowenthal	...	Ben Tennyson / Truck Driver (voice)
	Rob Paulsen	...	Alien Pilot / Cotton Candy Vendor / Patrolman (voice)
	Vyvan Pham	...	Julie Yamamoto / Ship (voice)

Season 1, Episode 8: Be-Knighted

12 July 2008
A dragon escapes from the Forever Knights, and they ask Ben for help tracking down/killing the beast. The team learns why the Knights were formed. The hunt for the dragon reveals other surprises.

	Dee Bradley Baker	...	Chromastone / Humongousaur / Spidermonkey (voice)
	Clancy Brown	...	Dragon / Pilot (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Greg Ellis	...	Squire (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Hakeem Kae-Kazim	...	Connor (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	Michael York	...	Patrick (voice)

Season 1, Episode 9: What Are Little Girls Made Of?

7 June 2008
While relaxing near a secluded spot where Grandpa Max used to take Ben & Gwen, they notice a mysterious figure leaving flowers. When they try to make contact, the mystery person eludes them, they soon learn it's their Grandmother. She reveals some family secrets, and has a very special offer for Gwen.

	Barbara Bain	...	Verdona (voice)
	Dee Bradley Baker	...	Brainstorm / Jetray / Spidermonkey (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Juliet Landau	...	Natalie / Anodite Verdona (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	George Newbern	...	Frank Tennyson (voice)

Season 1, Episode 10: The Gauntlet

14 June 2008
The team destroys some alien armor that runs amok. They store it to keep safe. But someone who used to bully Ben manages to find it and cause trouble for everyone.

	Dee Bradley Baker	...	Chromastone / Goop (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Matt Levin	...	Cash (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	Scott Menville	...	JT (voice)

Season 1, Episode 11: Plumber's Helpers

19 July 2008
Two plumber's children are taking down all aliens. Now they have their sites set on the team. The team has to fight Ben's old alien forms, Four Arms and XLR8.

	Yuri Lowenthal	...	Ben Tennyson (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Big Chill / Swamp Fire / Fleeing Alien (voice)
	Juliet Landau	...	Helen (voice)
	Khary Payton	...	Manny (voice)
	Adam Wylie	...	Pierce (voice)

Season 1, Episode 12: Paradox

5 July 2008
An abandoned military base leads to an encounter with a self-proclaimed hero and a mysterious creature that ages people and objects. The team must stop the creature and help the hero who claims they've met before and will meet again.

	Dee Bradley Baker	...	Chromastone / Humongousaur / Jetray / Swamfire / Hugo (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	David McCallum	...	Paradox (voice)
	Richard McGonagle	...	General Groff (voice)

Season 1, Episode 13: X Equals Ben Plus 2

31 August 2008
Alien Bounty Hunter Seven Seven is after an alien princess. Her father will stop at nothing to get her back, including threatening Earth with destruction if she's not returned safely. When a major crisis arises, Ben uses Alien X for the first time. Ben learns about his most powerful alien form, and everything that comes with it.

	Dee Bradley Baker	...	Swampfire / Bandaged Warrior / Sevenseven (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Kevin Conroy	...	Bellacus / Warrior #2 (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Vicki Lewis	...	Serena
	Yuri Lowenthal	...	Ben Tennyson (voice)
	Kevin Michael Richardson	...	Emperor Milleous / Warrior #1 (voice)
	Tara Strong	...	Princess Attea (voice)
	James Arnold Taylor	...	Attendant #1 / Raff (voice)

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Season 2

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Season 2, Episode 1: Darkstar Rising

10 October 2008
As the team checks on a possible alien plot, they're stopped by a Plumber. He accuses them of impersonating Plumbers, and orders them not to fight any more aliens until the situation can be sorted out, in a few months. A new villain emerges, Darkstar. He allies himself with the DNAliens, and they go after Ben and the others.

	Yuri Lowenthal	...	Ben Tennyson (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Chromastone / Goop / Humongousaur / DNAlien #1 / DNAlien #2 / DNAlien #3 (voice)
	Paul Eiding	...	Highbreed (voice)
	J.K. Simmons	...	Magister Ghilhil (voice)
	Wil Wheaton	...	Mike Morningstar / Darkstar (voice)

Season 2, Episode 2: Alone Together

17 October 2008
During a battle Ben and an alien commander are teleported to a distant world. They must put their differences aside if they're going to have any chance of finding a way to return to Earth.

	Dee Bradley Baker	...	Big Chill / Echo Echo / Swampfire / Dravek / Dasypodidae (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Yuri Lowenthal	...	Ben Tennyson (voice)
	Richard McGonagle	...	Reinrassig III (voice)

Season 2, Episode 3: Good Copy, Bad Copy

24 October 2008
A group of Forever Knights are attacked by Ben, and he's looking for Ben? Gwen and Kevin ask Ben if he's holding back anything, he claims he's been busy studying. The truth will lead to a meeting with the Omnitrix's creator, Azmuth.

	Yuri Lowenthal	...	Ben Tennyson / Albedo's Ben Tennyson Form (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Big Chill / Brainstorm / Chromastone / Echo Echo / Goop / Humongousaur / Jetray / Spidermonkey / Swampfire (voice)
	Jeff Bennett	...	Azmuth (voice)
	Greg Ellis	...	Forever Knight #1 / Forever Knight #2 / Jailer (voice)
	Robert David Hall	...	Counterman / Forever Knight #3 (voice)
	Vyvan Pham	...	Julie

Season 2, Episode 4: Save the Last Dance

7 November 2008
When Gwen demands that Kevin take her to the schools summer dance, Ben offers Kevin good advice. Meanwhile, Ben and Julie contend with a malfunctioning Omnitrix and a rogue Big Chill.

	Yuri Lowenthal	...	Ben Tennyson (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Big Chill (voice)
	Vyvan Pham	...	Julie Yamamoto / Waitress (voice)

Season 2, Episode 5: Undercover

14 November 2008
Kevin works on a transporter device, they go to Cooper to get it working properly. But they find that their old friend has been kidnapped. When they find him, they stumble on a hidden DNA alien base.

	Yuri Lowenthal	...	Ben Tennyson (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin (voice)
	Dee Bradley Baker	...	Big Chill / DNAlien #1 / Goop / Echo Echo (voice)
	Kevin Michael Richardson	...	DNAlien #2 / Guard #1 / Beefy Trucker (voice)
	Richard McGonagle	...	Guard #2 / HighBreed / Sheriff (voice)
	Corey Padnos	...	Cooper (voice)

Season 2, Episode 6: Pet Project

21 November 2008
The Forever Knights develop a ship that will use to travel to the dragon's home world to destroy all dragons. To make it fully functional, they capture Ship, the alien Upgrade pet Ben and Julie met.

	Yuri Lowenthal	...	Ben Tennyson / Brad (voice)
	Ashley Johnson	...	Gwen (voice)
	Greg Cipes	...	Kevin / Rubber Suit Alien (voice)
	Dee Bradley Baker	...	Swampfire / Jet Ray / Driver (voice)
	Kevin Michael Richardson	...	TV Narrator / Sir Morton / Knight #1 / Big Ship (voice)
	Tim Curry	...	Dr. Chadwick (voice)
	Vyvan Pham	...	Julie / Ship / Ingenue (voice)

Season 2, Episode 7: Grounded

23 November 2008
Ben's parents witness Ben changing into an alien hero, and watch him fight a Highbreed alien. When he returns, he's forbidden from using the Omnitrix. They contact Gwen's parent, and they restrict her activities. Kevin has to face the latest menace on his own, but he going to need help. Can Ben turn his back on his friend in his hour of need?

	Yuri Lowenthal	...	Ben Tennyson (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Humungousaur / Swampfire / Echo Echo (voice)
	Kevin Michael Richardson	...	HighBreed Commander / DNAlien (voice)
	Don McManus	...	Carl Tennyson (voice)
	Beth Littleford	...	Sandra Tennyson (voice)

Season 2, Episode 8: Voided

5 December 2008
The Plumber's Helpers call Ben asking for help against Devoid. Ben goes into the Null Void alone to assist them and finds an old enemy with new powers, and he finds other surprises.

	Yuri Lowenthal	...	Ben Tennyson (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Dirt Farmer / Big Chill / Brainstorm / Chromastone / Humungosaur (voice)
	Paul Eiding	...	Grandpa Max / Alien Serf (voice)
	Juliet Landau	...	Helen (voice)
	Dwight Schultz	...	Null Void Guardian / D'Void / Dr. Animo (voice)
	Khary Payton	...	Manny (voice)
	Adam Wylie	...	Pierce (voice)

Season 2, Episode 9: Inside Man

12 December 2008
A regular human stumbles onto some DN Aliens and steals their semi-truck and crashes it. The local authorities do not believe him. Ben and the others show up. They find out what the HighBreeds are planning, and other secrets of the DN Aliens.

	Yuri Lowenthal	...	Ben Tennyson / Omnitrix (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin / DNAlien #3 (voice)
	Dee Bradley Baker	...	Humongousaur / Chromastone / Jetray / DNAlien #1 / Xenocyte (voice)
	Wallace Langham	...	Tyler / DN Alien #2 (voice)
	Richard McGonagle	...	High Breed #1 / Desk Sergeant / New Cop (voice)
	Paul Eiding	...	DN Alien #5 / DN Alien #4 (voice)

Season 2, Episode 10: Birds of a Feather

24 March 2009
The Alien Force gets some unexpected help during a fight with some DN Aliens from a spider monkey. Ben finds out he's the rightful crown prince of his people, but had his authority usurped, he needs a crystal to prove he's worthy of the crown. The Alien Force helps the prince.

	Yuri Lowenthal	...	Ben Tennyson (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Big Chill / Chromastone / Jet Ray / Goop / Spidermonkey / High Breed (voice)
	Diedrich Bader	...	Simian / Lu (voice)

Season 2, Episode 11: Unearthed

25 March 2009
The team hears of a creature that rampages at night in the desert and investigates. They find the creature, and some DN Aliens.

	Yuri Lowenthal	...	Ben Tennyson (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Echo Echo / Chromastone / Humungasaur / Alien Mother (voice)
	Jeff Bennett	...	DNA Alien / Alien Dad (voice)

Season 2, Episode 12: War of the Worlds: Part One

27 March 2009
Paradox and Azmuth arrive with grave news. The DN Aliens are ready to make their move. While Gwen and Kevin gather help, Azmuth reveals some secrets of the Omnitrix and its true purpose.

	Yuri Lowenthal	...	Ben Tennyson / Omnitrix (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Jetray / Swampfire / DN Alien / Upchuck / Human / Cannonbolt / Way Big / Humungousaur (voice)
	Jeff Bennett	...	Azmuth (voice) (as Jeff Glen Bennett)
	Robert David Hall	...	Highbreed Guard (voice)
	David McCallum	...	Paradox (voice)
	Richard McGonagle	...	Highbreed (voice)
	Vyvan Pham	...	Julie Yamamoto / Ship
	Kevin Michael Richardson	...	DN Alien #3 / Highbreed Commander / Big Ship (voice)
	Zeno Robinson	...	Alan Albright / Heatblast (voice)
	Wil Wheaton	...	Darkstar (voice)

Season 2, Episode 13: War of the Worlds: Part Two

27 March 2009
The Alien Force could not stop the DN Alien Fleet from arriving. More re-enforcements arrive, but this battle can't be won on Earth. A small group goes to the home world to force the leaders to stop the invasion.

	Yuri Lowenthal	...	Ben Tennyson / Omnitrix (voice)
	Ashley Johnson	...	Gwen Tennyson (voice)
	Greg Cipes	...	Kevin Levin (voice)
	Dee Bradley Baker	...	Swampfire / Humungosaur / Brainstorm (voice)
	Jeff Bennett	...	Azmuth (voice) (as Jeff Glen Bennett)
	Paul Eiding	...	Grandpa Max / DNA alien (voice)
	Robert David Hall	...	Highbreed Guard (voice)
	David McCallum	...	Paradox (voice)
	Richard McGonagle	...	Reinreasic III / Highbreed Supreme Commander (voice)
	Khary Payton	...	Manny (voice)
	Vyvan Pham	...	Julie Yamamoto / Ship
	Kevin Michael Richardson	...	DN Alien #3 / Highbreed Commander / Big Ship (voice)
	Wil Wheaton	...	Darkstar (voice)